particularly like surgery, but i like the effect of it, i like what it can do for people's lives, particularly with children. you know, you're successful, your reward maybe 40, 50, 60 years of healthy life. >> i read that you always said a prayer before beginning an operation. >> that's correct. i believe that god made the body and is the source of all wisdom, and i am definitely not one of those physicians who thinks that they are god. >> somebody, professors, insurgence at hopkins keep on practicing. retirement doesn't seem to fit in with the resume of a full professor of medicine at johns hopkins, at least for a lot of people that i have come in contact with. what made you choose to get out of it? >> well,, you know, i believe that it's very good to leave while you're at the top of the game rather than after you've begun to slide.